JEE Main Physics question

A solid cylinder of mass and radius is rolling on a rough inclined plane of inclination . The coefficient of friction between the cylinder and incline is . Then

(A)Frictional force is always
(B)Friction is a dissipative force
(C)By decreasing , frictional force decreasesCorrect
(D)Friction opposes translation and supports rotationCorrect

Answer: (C),(D)

Solution

The required static friction is (not the limiting value in general, so (A) is false), does no net work (not

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Question ID VK-159146